I and probably many others that have not received an invite to the reveal have specific questions regarding the model 3. Would it be possible for those attending to answer them. in my case I need to know how much headroom there is for those sitting in the rear seats. More specifically, our son is 6' 3" tall so will his head hit the roof like it does with the non-pano model S (his head just barely clears with a pano roof)? Since it is a "ride" and not a "drive" event there should be quite a number for rear seat occupants so please respond with your thoughts. We are planning on reserving one once we know the answer to this important question. Thanks.